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水/有机溶剂体系中产紫青霉全细胞催化合成单葡糖醛酸基甘草次酸
引用本文:邹树平,张琦,李丽敏,郭燕霞,戴大章,李春.水/有机溶剂体系中产紫青霉全细胞催化合成单葡糖醛酸基甘草次酸[J].化工学报,2009,60(8):2040-2045.
作者姓名:邹树平  张琦  李丽敏  郭燕霞  戴大章  李春
作者单位:北京理工大学生命学院,北京 100081;天津大学化工学院,天津 300072
基金项目:国家自然科学基金,北京市自然科学基金,北京理工大学研究生科技创新项目,北京理工大学基础研究项目 
摘    要:研究了产紫青霉Penicillium purpurogenum Li-3 全细胞β-D-葡萄糖醛酸苷酶在水/有机溶剂体系中催化水解甘草酸,合成单葡糖醛酸基甘草次酸(GAMG)的反应。确定了最适反应体系为水/叔丁醇(体积比为3∶7),最适反应条件为:底物甘草酸用量1.5 g•L-1、反应温度45℃、pH值5.0、全细胞酶量7 g•L-1、摇床转速120 r•min-1,在此条件下反应48 h,产物GAMG产率可达79.12%,全细胞酶具有较好的稳定性和可重复使用性,显示了良好的应用前景。

关 键 词:生物转化  单葡糖醛酸基甘草次酸  水/有机溶剂体系  产紫青霉  全细胞  β-D-葡萄糖醛酸苷酶  
收稿时间:2009-1-4
修稿时间:2009-5-10  

Biosynthesis of glycyrrhetinic acid monoglucuronide by whole-cell of Penicillium purpurogenum in an aqueous / organic system
ZOU Shuping,ZHANG Qi,LI Limin,GUO Yanxia,DAI Dazhang,LI Chun.Biosynthesis of glycyrrhetinic acid monoglucuronide by whole-cell of Penicillium purpurogenum in an aqueous / organic system[J].Journal of Chemical Industry and Engineering(China),2009,60(8):2040-2045.
Authors:ZOU Shuping  ZHANG Qi  LI Limin  GUO Yanxia  DAI Dazhang  LI Chun
Abstract:Biosynthesis of glycyrrhetinic acid monoglucuronide (GAMG) by β-D-glucuronidase from the whole cell of Penicillium purpurogenum Li-3 in an aqueous / organic system was studied.Results showed that tert-butyl alcohol is the best organic solvent and the optimum volume ratio of aqueous to organic phase is 3 to 7.The rest optimum conditions for this biocatalysis are 1.5 g•L-1 of substrate concentration, 45℃ of temperature, pH 5.0, 7 g•L-1 of enzyme concentration and 120 r•min-1 of shaking rate.Under these optimized conditions,79.12% yield of GAMG was achieved after 48 h reaction. The whole-cell enzyme has a good reusability and a high stability, which demonstrates the prospect for real application.
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